Hanneke Weitering

Around the same time that the dinosaurs became extinct on Earth, a volcano on Mars went dormant, NASA researchers have learned.

The discovery of seven Earth-size planets around a nearby star, TRAPPIST-1, is certainly exciting news. But what would it take to visit one of these potentially Earth-like alien worlds?

As a winter storm blew over the northeastern United States today, a weather-monitoring satellite caught the whole storm on camera from space.

Nearly two years after its historic encounter with the dwarf planet Pluto, NASA's New Horizons spacecraft is getting ready for its next big adventure in the icy outskirts of the solar system.

Astronaut Thomas Pesquet just took "Rocky Mountain High" to a whole new level with this incredible photo of the Rocky Mountains taken from the International Space Station.

Behold! The European Space Agency's new Mars orbiter just sent back its first high-resolution images of the Red Planet, and the view is amazing.

Last week, NASA's Mars rover Curiosity stumbled upon a dark grey, golf ball-sized object that looks nothing like the typical red-orange rocks typically seen on Mars.

More than a trillion galaxies are lurking in the depths of space, a new census of galaxies in the observable universe has found — 10 times more galaxies than were previously thought to exist

President Barack Obama wants the U.S. space program to send astronauts to Mars by the 2030s and eventually into deep space, he wrote in a CNN op-ed published today (Oct. 11).

A new simulation of how Pluto got its "heart" reveals that the dwarf planet most likely has a deep ocean beneath its surface.

A giant blob of gas and dust far off in the universe mysteriously glows bright green, and astronomers have finally figured out why.

As a wildfire blazes through a mountain pass in Southern California, two NASA satellites were able to snap photos of the smoke from space.